Improved device for preventing corrosion of the binding-screws in galvanic batteries



G. DOYLE.

Electric Battery.

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Patented Ma-rch 30, 1858 H l I/Hlll!!! Fay ,a

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UNITED STATES PATENT OFFICE.

GEORGE DOYLE, OF OTTAWA, ILLINOIS.

IMPROVED DEVICE FOR PREVENTING CORROSION 0F THE BINDING-SCREWSlNGALVANIC BATTERIES.

Specication forming part of Letters Patent N 0. 19,759, dated March 30,1858.

To all 'whom it may concern:

Be it known that I, GEORGE DOYLE, of Ottawa, in the county of La Salleand State of Illinois, have invented a new and useful Improvement inGalvanic Batteries for Telegraphs and other Purposes; and I do herebydeclare that the following is a full, clear, and eXact description ofthe same, reference being had to the accompanying drawings, making partof this specification, in which- Figure l is an elevation ot' a batterywith my improvement. Fig. 2 is a plan of onejar of the battery.

.Similar letters of reference indicate correspondin g parts in bothfigures.

This invention consists in a novel and superior method of making theconnections whereby local action in and between the jars and thecorrosion of the binding-screws are effectually prevented.

To enable others skilled in the art to make and use my invention, I willproceed to de-- scribe its construction and operation.

A A are the jars, of glass or glazed or enameled earthen ware.

B B are covers, of similar material to the jars, or of hard gatta-perchaor other insulating substance, fitted over the mouths of the jars. Eachcover is provided with two holes, c c, to receive the Shanks of thebinding-screw sockets. C C are the sockets of the bindingscrews, and D Dare the binding-screws. E E are the screw-clamps for the zinc andplatina plates F and G. The Shanks b I) or" the binding-screw socketsare screwed onltheir eXterior and screw into the clamps E E, thusholding the said clamps firmly against the inside of the cover.

c c are washers, of india-rubber, leather, or

other sufficiently soft but durable material, in-

terposed between the clamps E'E and the covers B B, serving as packingto close the holes a a efectually.

The covers B B serve as effective insulators between the zinc andplatina plates of each jar, and the washers o c eifectually protect thebinding-screw clamps from the acid solution, and thus local action andcorrosion 0f the binding-screws, it is obvious, must bev ett'ectuallyprevented.

What I claim as my invention, and desire to secure by Letters Patent,is-

Making the connections of the battery by tting the jars with covers ofglass, glazed or enameled earthenware, gutta-percha,`or other insulatingsubstance, With holes in them to receive the shanks of the binding-screwsock-v ets, and screwing the said sockets through the said holes intothe clamps for the plates, with interposed washers of india rubber,

y leather, or similar protecting material, all substantially as hereindescribed.

GEORGE DOYLE. Witnesses:

THos. OR'roN, E. O. BRADFORD.

